SAE-AISI M4 Steel vs. AWS BAg-7

SAE-AISI M4 steel belongs to the iron alloys classification, while AWS BAg-7 belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is AWS BAg-7.

SAE-AISI M4 (T11304) Molybdenum High-Speed Steel AWS BAg-7 (P07563) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		83

Poisson's Ratio		0.29
Poisson's Ratio		0.34

Shear Modulus, GPa		76
Shear Modulus, GPa		31

Tensile Strength: Ultimate (UTS), MPa		770 to 2150
Tensile Strength: Ultimate (UTS), MPa		150

Thermal Properties

Latent Heat of Fusion, J/g		260
Latent Heat of Fusion, J/g		130

Melting Completion (Liquidus), °C		1610
Melting Completion (Liquidus), °C		650

Melting Onset (Solidus), °C		1560
Melting Onset (Solidus), °C		620

Specific Heat Capacity, J/kg-K		440
Specific Heat Capacity, J/kg-K		290

Thermal Expansion, µm/m-K		12
Thermal Expansion, µm/m-K		20

Otherwise Unclassified Properties

Density, g/cm³		8.3
Density, g/cm³		9.3

Embodied Carbon, kg CO₂/kg material		14
Embodied Carbon, kg CO₂/kg material		55

Embodied Energy, MJ/kg		210
Embodied Energy, MJ/kg		860

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		4.9

Stiffness to Weight: Bending, points		23
Stiffness to Weight: Bending, points		16

Strength to Weight: Axial, points		26 to 72
Strength to Weight: Axial, points		4.5

Strength to Weight: Bending, points		23 to 45
Strength to Weight: Bending, points		6.7

Thermal Shock Resistance, points		24 to 68
Thermal Shock Resistance, points		6.4

Alloy Composition

Carbon (C), %		1.3 to 1.4
Carbon (C), %		0

Chromium (Cr), %		3.8 to 4.8
Chromium (Cr), %		0

Copper (Cu), %		0 to 0.25
Copper (Cu), %		21 to 23

Iron (Fe), %		75.9 to 81.4
Iron (Fe), %		0

Manganese (Mn), %		0.15 to 0.4
Manganese (Mn), %		0

Molybdenum (Mo), %		4.3 to 5.5
Molybdenum (Mo), %		0

Nickel (Ni), %		0 to 0.3
Nickel (Ni), %		0

Phosphorus (P), %		0 to 0.030
Phosphorus (P), %		0

Silicon (Si), %		0.2 to 0.45
Silicon (Si), %		0

Silver (Ag), %		0
Silver (Ag), %		55 to 57

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0

Tin (Sn), %		0
Tin (Sn), %		4.5 to 5.5

Tungsten (W), %		5.3 to 6.5
Tungsten (W), %		0

Vanadium (V), %		3.8 to 4.5
Vanadium (V), %		0

Zinc (Zn), %		0
Zinc (Zn), %		15 to 19

Residuals, %		0
Residuals, %		0 to 0.15